Forging flaw determination system, forging flaw determination device, and forging flaw determination method

Abstract

A forging flaw determination system includes a forging analysis device and a forging flaw determination device. The forging analysis device is configured to generate a forged article model in a plurality of forging processes for forging, and includes a first controller. The first controller is configured to calculate a strain rate based on an analysis mesh for the forged article model. The forging flaw determination device is configured to predict, based on the forged article model, the presence or absence of a flaw phenomenon when a forged article is formed in each forging process for the forging, and includes a second controller. The second controller is configured to determine the presence or absence of the flaw phenomenon based on the strain rate and a face angle between faces of adjacent analysis meshes.

What is claimed is: 
     
         1 . A forging flaw determination system comprising:
 a forging analysis device that is configured to generate a forged article model in a plurality of forging processes for forging and includes a first controller, the first controller being configured to calculate a strain rate based on an analysis mesh for the forged article model; and   a forging flaw determination device that is configured to predict, based on the forged article model, presence or absence of a flaw phenomenon when a forged article is formed in each forging process for the forging and includes a second controller, the second controller being configured to determine the presence or absence of the flaw phenomenon based on the strain rate and a face angle between faces of adjacent analysis meshes.   
     
     
         2 . The forging flaw determination system according to  claim 1 , wherein the first controller is configured to:
 generate the analysis mesh for the forged article model;   calculate a distance between the forged article model and a die; and   calculate the strain rate based on an amount of change in the forged article model between forging processes.   
     
     
         3 . The forging flaw determination system according to  claim 2 , wherein the second controller is configured to:
 calculate the face angle between the faces of the adjacent analysis meshes;   calculate a predicted value of the flaw phenomenon based on the strain rate and the face angle; and   determine the presence or absence of the flaw phenomenon based on the predicted value and the distance.   
     
     
         4 . The forging flaw determination system according to  claim 3 , wherein the second controller is configured to calculate the predicted value of the flaw phenomenon by logistic regression analysis in which the strain rate and the face angle are set as explanatory variables and occurrence of the flaw phenomenon is set as an objective variable. 
     
     
         5 . A forging flaw determination device that is configured to predict, based on a forged article model in a plurality of forging processes for forging, presence or absence of a flaw phenomenon when a forged article is formed in each forging process for the forging, the forging flaw determination device comprising a second controller that is configured to:
 calculate a strain rate based on an analysis mesh for the forged article model; and   determine the presence or absence of the flaw phenomenon based on the strain rate and a face angle between faces of adjacent analysis meshes.   
     
     
         6 . A forging flaw determination method to be executed in a forging flaw determination system, the forging flaw determination system including a forging analysis device configured to generate a forged article model in a plurality of forging processes for forging, and a forging flaw determination device configured to predict, based on the forged article model, presence or absence of a flaw phenomenon when a forged article is formed in each forging process for the forging, the forging flaw determination method comprising:
 calculating, by the forging analysis device, a strain rate based on an analysis mesh for the forged article model; and   determining, the forging flaw determination device, the presence or absence of the flaw phenomenon based on the strain rate and a face angle between faces of adjacent analysis meshes.